摘要
采用凝胶色谱法测定氟醚橡胶的相对分子质量及其分布。分别对单检测器(示差检测器)及三检测器(示差-光散射-黏度检测器)进行了方法研究。确立了以四氢呋喃为流动相,PLgel MIXED-B两柱串联,柱温为40℃,流量为1 mL/min的分析条件。利用本法测定聚苯乙烯标准物质的相对分子质量,测定值相对标准偏差均小于3%(n=6),数均相对分子质量相对误差小于10%,重均相对分子质量相对误差绝对值小于1%。
The molecular weight and distribution of fluoroether rubber were measured by gel permeation chromatography.Methods involved single-detector GPC(differential refractive index detector)and three-detector GPC(refractive index–light scattering–viscosity detectors)were studied.The experimental conditions were that the tetrahydrofuran as flow phase,flow rate of 1 mL/min.Two Plgel Mixed-B columns in series were used with column temperature of 40℃.The relative deviation for molecular weight of polystyrene standard material determined by two methods were less than 3%(n=6),the relative error of number average relative molecular mass was less than 10%,and the absolute value of the relative error of weight-average relative molecular mass was less than 1%.
作者
董雅卓
冀克俭
侯倩倩
许峰
张文申
宋磊
李胜凯
Dong Yazhuo;Ji Kejian;Hou Qianqian;Xu Feng;Zhang Wenshen;Song Lei;Li Shengkai(Shandong Nonmetallic Materials Institute,Jinan 250031,China)
出处
《化学分析计量》
CAS
2021年第3期27-30,共4页
Chemical Analysis And Meterage
基金
国防科工局技术基础项目(JSJL2017208A013)。
关键词
凝胶色谱
相对分子质量
氟醚橡胶
三检测器
gel permeation chromatography
molecular weight
fluoroether rubber
three-detector
